[Camera] Update the instructions for liveview (project-chip#40529)

* [Camera] Update the instructions for liveview

* Address AI comment

Author: yufengwangca

examples/camera-app/linux/README.md

@@ -24,6 +24,7 @@ sudo apt install \
   gstreamer1.0-plugins-base \
   gstreamer1.0-plugins-good \
   gstreamer1.0-plugins-bad \
+  gstreamer1.0-plugins-ugly \
   gstreamer1.0-libav \
   libgstreamer1.0-dev \
   libgstreamer-plugins-base1.0-dev \

examples/camera-controller/README.md

@@ -141,8 +141,7 @@ example on your Linux machine. You will need two separate terminal windows.
 
 Terminal 1: Start the Camera App (Device)
 
-1. Launch the chip-camera-app binary. The --camera-deferred-offer flag prepares
-   the camera to stream upon request from the controller.
+1. Launch the chip-camera-app binary.
 
 Clean up any existing configurations (first-time pairing only):
 
@@ -151,7 +150,7 @@ sudo rm -rf /tmp/chip_*
 ```
 
 ```
-./out/linux-x64-camera/chip-camera-app --camera-deferred-offer
+./out/linux-x64-camera/chip-camera-app
 ```
 
 Terminal 2: Launch and Use the Camera Controller (Client)